I'm guessing it would fit between a size 10-16 because of the adjustibility of the drawstring waist, and is hemmed for someone 5'6" tall. If you want to replicate this for your own measurements, just adjust the math on the pattern. You'll want the finished waist to be at least 5 inches wider than your waist measurement for the drawstring. Don't forget to include 1/2 inch seam allowances on your squares. Have fun!

This is so cool exactly skirt I want to make. Can I ask is the 10-16 is the UK sizing?